La ‘collaborazione invisibile’ in strutture archeologiche: pietra e metallo negli interventi di consolidamento tra gli anni Cinquanta e Settanta del Novecento.

Luca Scappin

Università IUAV di Venezia, scappin@iuav.it

ABSTRACT

In the decades between the fifties and seventies of the twentieth century some archaeological artifacts in stone work (Arch of Constantine in Rome, 'Ala' of Arena in Verona, Temple of Athena at Paestum, the Great Temple of Segesta) constituted a field of experimentation with innovative techniques of consolidation, that inserted new metal elements (spread vertical and horizontal hingings, armor of single blocks of stone, deep local pins, cemented lattices, armed stitchings, post-tensioned cables) based on the comparison between the behavior of reinforced concrete and the stone work. This paper proposes a critical analysis of the cases of consolidation mentioned above, starting from a specific historical reconstruction of the executed interventions, in order to highlight the approach of the static problem, considered 'modern' setting, which prevailed in the conceptions of the restoration of that period. In fact since the eighties, considering the negative outcomes of those, these positions were overcome by integrating the traditional approach, characterized mainly by the use of external structures of the garrison, with the innovations offered by the progress of materials and technology.

Parole chiave/Key-words: Metal and restoration, structural consolidation in archeology, consolidation of facilities in square work